Smoke device and smoke detection circuit

Abstract

A method for monitoring a location performed by one or more processors comprises receiving signals from a smoke sensor; determining one or more minutiae from the received signals; determining a time window based on the at least one determined one or more minutiae; characterizing one or more smoke or fire types in the determined time window based on one or more of the determined one or more minutiae; dynamically determining one or more alarm levels based on the characterized one or more smoke or fire types; evaluating at least one minutiae in the determined time window using the determined one or more alarm levels; and outputting an alarm signal if an alarm condition is determined.

The invention claimed is: 
     
       1. A detection circuit embodied in one or more processors for monitoring a location, the detection circuit comprising:
 a minutiae computer module configured for receiving signals from a smoke sensor and determining one or more minutiae from the received signals; 
 a ripple detector start/reset timer module configured for receiving at least one of the determined one or more minutiae and determining at least a start time for evaluating one or more of the one or more minutiae; 
 a scheduler/minutia analyzer and fire type probability analyzer module configured for evaluating the one or more of the determined one or more minutiae and characterizing the one or more of the one or more minutiae according to one or more smoke or fire types; 
 a fire type and alarm level selector configured for setting one or more alarm levels based on the characterized one or more smoke or fire types; and 
 an alarm level detector for evaluating at least one minutiae using the set one or more alarm levels and outputting an alarm signal if an alarm condition is determined; 
 wherein the one or more minutiae comprises one or more of signal amplitude, signal velocity, signal acceleration, average signal amplitude, average signal velocity, or average signal acceleration; 
 wherein the signal amplitude comprises one or more of absolute signal amplitude or an amplitude differential; and 
 wherein the signal velocity and signal acceleration are determined from the signal amplitude. 
 
     
     
       2. The detection circuit of  claim 1 , wherein the evaluating the one or more minutiae by the scheduler/minutia analyzer and fire type probability analyzer module comprises comparing the one or more of the one or more minutiae to one or more parameters corresponding to characteristics of the one or more smoke or fire types. 
     
     
       3. A smoke device comprising:
 the detection circuit of  claim 1 ; 
 the smoke sensor in communication with the minutiae computer module; and 
 an alarm in communication with the alarm level detector. 
 
     
     
       4. The smoke device of  claim 3 , wherein the detection circuit, the smoke sensor, and the alarm are disposed in a housing. 
     
     
       5. The smoke device of  claim 4 , wherein the smoke device is a smoke detector or a smoke alarm. 
     
     
       6. The smoke device of  claim 4 , wherein the smoke device is a fire panel. 
     
     
       7. A method for monitoring a location comprising:
 receiving signals from a smoke sensor and determining one or more minutiae from the received signals; 
 receiving the determined one or more minutiae and determining at least a start time for evaluating one or more of the one or more minutiae based on some or all of said determined one or more minutiae; 
 evaluating the one or more of the one or more minutiae and characterizing the one or more minutiae according to one or more smoke or fire types; 
 dynamically setting one or more alarm levels based on the characterized one or more smoke or fire types; and 
 evaluating at least one minutiae using the set one or more alarm levels and outputting an alarm signal if an alarm condition is determined; 
 wherein the one or more minutiae comprises one or more of signal amplitude, signal velocity, signal acceleration, average signal amplitude, average signal velocity, or average signal acceleration; 
 wherein the signal amplitude comprises one or more of absolute signal amplitude or an amplitude differential; and 
 wherein the signal velocity and signal acceleration are determined from the signal amplitude. 
 
     
     
       8. The method of  claim 7 , wherein the evaluating the one or more minutiae by the scheduler/minutia analyzer and fire type probability analyzer module comprises comparing the one or more of the one or more minutiae to one or more parameters corresponding to characteristics of the one or more smoke or fire types. 
     
     
       9. The method of  claim 7 , further comprising:
 activating an alarm in response to the output alarm signal.